Journal



1934- c. E. HERMANN 1,983,130

JOURNAL Filed March 11, 1932 5 Sheets-Sheet 1 i3 if INVENTOR J7- ddr/azfflexmw/rr 37 ATTORNEY.

Dec;. 1, 1934.

. C. E. HERMANN JOURNAL Filed March 11, 19:52 5 Sheets-Sheet 2 V IN V EN TOR Kim/e5 [Y #0771401 ATTO EY' Dec. 4, 1934. c. E.'HERMANN JOURNAL Filed March 11, 1932 5 Sheets-Sheet 3 l N V EN TOR. war/ea t; fie/WM/I/I ATTORNEY.

Patented Dec. 4, 1934 d i dd 7 d 4 UNITED STATES, PATENT OFFICE I JOURNAL d d Charles Edward HermannQSt. Louis, Mo. Application March 11, 1932, Serial No. 598,218

4Cl airns. *(01. -470 This invention relates to new and useful imble' casing member revolubly supported on said provements in oil journals for roller mills. In shaft and having a dust and oilseal therewith this type of mill a vertically disposed revoluble and with said upper casing, a roller non-rotatspider or support has pivotally suspendedthereably mounted on the lower .end of said revoluble 5 from a plurality of journals spaced equidistant casing, and means for adjustingjsaid shaft in about the axis of rotation The lower end of said upper casing axially to take up the wear each journal carries a revoluble roller which of the wearing pieces of said shaft and said when thelmill is in actuation'is moved by cenrevoluble casing. trifugal actionagainst and operates over the in- Still further objects, of the invention are to 10. near face of a grinding ring so that the material provide a journal comprising an upper casing contained-in the mill chamber isground by the adapted to be pivotally suspended from the mill action of the rollers against said ring. As the spider, a shaft adjustably fixed insaid upper rollers operate athigh-speed in a chamber which casing and extending therebelow, a revoluble is full of finely ground abrasive material and as casing revolubly mounted on the lower half of 15; the journal is subjected to a great deal of strain said shaft and having its lower end extending on account of the blows received from striking below said shaft and'formingan oil reservoir, largepieces of rock or othermaterial contained and oil passageways formed in said shaft and in the; chamber, it is obvious that the journal in said revoluble casing for forcing the oil from should have ample and efiicient lubrication, that sa d res v upwa dly, and d s ar i t a v 20 it should havelarge'bearing surfaces and be of the majo points of engagem nt ,Of a d, Shaft 5 sturdy construction, and that it be dust-proof with said revoluble casing, whereby oil is caused toprotect the bearings and at the same time to circulate from said reservoir to the principal prevent grease and oil from escaping from the bearing Su acesand retu s by gravity 110 said journal into the grinding chamber. ir.

,25 The objects of the'present-invention ar to Still further objects of the invention are to provide a journal which is efiiciently lubricated provide n a jo t class, described a and hasllarge oil capacity, whi h is of sturdy shaft having its upper endscrew-seated in the construction and is adjustable to provide for pp 8nd of e pivotally Suspended casing nd wear of the wearing surfaces and whichis sealed adjustable n t i y fi means f 30 so as toprevent dust fromentering the journal engaging thel pp end of Said s a t and locking p and also seal the grease and oil therein. it against rotation. d

,Other objects of the invention are to provide Additional objects'of the invention are to proa journal for pulverizing machines having a stavide a journal for pulverizing mills which is of tionarily mounted shaft and having arevoluble strong construction, can be readily adjus d to 35. lower'casing carried by said shaft and carrying take up wear on the bearings, has large oil capacthe rollenthe lower end of said casing forming ity and means for recirculating the oil past said an oil reservoir and said shaft and said casingv bearingsand is so constructed that is can be being; provided with oil passageways whereby oil readily assembled and disassembled. isforcibly supplied to the principal bearing sur- With these and other objectsin view, my in- 40 fa l i vention consists in certain novel features of con- Still Other ObJ G 0f theinvention a e & p 0- struction and arrangement of parts, hereinafter vide a io rnalxh v ns a w -p casing and a more fully described and claimed, and illustrated shaft arranged therein, theupper casing being in the accompanying drawings. in pivotauy suspended and having Said Shaft Figure -1 is a vertical cross section through 45 justably secured thereto and the lower casing m im roved .oumal t ke n11 of Fi being revolubly mounted onthe lower half of .2 p J n O g said shaft and carrying at its lower end, the pulverizing roller, said revoluble casing forming 35 5 fie ugg r gg zk lilllo?artly in cross 50 5223 sealiwlth shaft and with Figure 3 is a horizontal cross section taken on Further objects of the invention are to pro- 3 f F1gure videa 3011mm omprising an upper casing-mem Figure 4 1s a horizontal cross section taken ber adapted to be pivotally suspended from the 011 1 1I1e 0f Flgllle mill spider, a shaft fixed in saidcasing member Figure 5 IS a horizontal cross section taken 55 and extendingdownwardly therefrom, a revo1uon line 5-5 of Figure 1. y i 1 Figure 6 is a vertical cross section taken on line 6--6 of Figure 5.

Figure 7 is a detail cross section of the upper end of the journal showing modified adjusting means.

Figure 8 is a top plan view of same, partly in cross section.

Referring by numerals to the accompanying drawings, 10 indicates a horizontally disposed trunnion shaft on which is arranged the horizontally disposed tubular extension 11 of casing 12. This extension which is formed integral with said casing is arranged to one side thereof and is non-rotatably fixed to said trunnion shaft by a pin 14. The ends of said trunnion shaft are revolubly mounted in suitable bearings formed in the ends of a spider (not shown) so that said casing member 12 and parts associated therewith are pivotally suspended from said spider. The upper end of casing member 12 is internally threaded as shown at 15 and screwseated therein is the threaded upper end 16 of a shaft 17. The upper end of shaft 17 is formed with an extension 18 which is non-circular in cross section, preferably hexagonal, and extends beyond the upper end of casing member 12. A cap 19 is provided with an inner chamber 20 which is of the same cross sectional contour as head 18 and fits thereover. This cap is provided with a flange 21 having suitable apertures 22 for receiving bolts 23 which latter are screwseated in the upper end of member 12 and hold said cap 19 in fixed position on said member, thereby locking the shaft 17 against rotative movement. These apertures 22 are preferably formed elongated and arcuate to permit slight turning or adjusting movement of the cap to fit the non-circular head 18.

The lower end of shaft 17 extends a suitable distance below casing member 12 and is provided with a collar 17a preferably formed integral therewith a suitable distance from the lower end 17b. A bearing ring or wearing piece 24 is fixed to the upper face of collar 17a by a plurality of pins 25, and a bearing ring or wearing piece 26 rests on the first ring and is fixed by screws 2'? to the lower revoluble casing 28.

The upper casing member 12 and shaft 17 are stationary and the lower casing member 28 is revolubly mounted on said shaft by means of collar 17a and rings 24 and 26.

The lower or revoluble casing 28 consists of two sections 29 and 30, the abutting ends of which are provided, respectively, with flanges 31 and 32. These flanges are formed with coinciding apertures in which are received bolts 34. Nuts 35 are screw-seated on the ends of said bolts and draw said flanges together.

Each nut 35 is locked in position by a, cotter pin 36.

The peripheral face of the lower section 30 is tapered downwardly and receives a roller 37 which is held thereon in non-rotative engagement therewith by a key 38. The object of forming the lower section tapered is to permit use of rollers of various thickness and at the same time hold them in proper position without the use of shoulders.

The lower end of section 30 is provided with an extension 39 which is externally threaded and receives a'nut 40. This nut bears against the underside of the roller and locks it against downward movement. One side of the nut is split horizontally, as indicated at 41, and a set screw 42 is screw-seated in the lower half and bears against the upper half, thereby slightly distorting said portions and locking said nut against accidental movement.

A bushing 44 is placed in the bore 45 formed in the section 30 and forms a bearing for the lower portion of shaft 17. The upper end of this bushing is flanged, as indicated at 46, and rests on an annular shoulder 4'7 to which it is secured by pins 48. This shoulder, which extends a suitable distance upwardly from the upper end of section 30, receives the lower end of section 29 and interlocks the two sections together. The upper face of flange 46 bears against the underside of collar 17a and provides a stop to limit the upward movement of the lower casing member 28 relatively to said shaft and casing 12.

Flange 46, collar 17a, and bearing rings 24 and 26 are received in a large bore 49 formed in the lower part of section 29. This large bore connects at its upper end with a smaller bore 50 which opens into an oil chamber 51 formed in the upper portion of section 29. The smaller bore 50 receives a bushing 52 which forms a bearing for the intermediate portion of shaft 17. The lower end of this bushing is provided with a flange 53 which rests on the upper bearing ring 26 to which it is secured by screws 27. These screws are seated in apertures formed in the inwardly disposed flange 29 of section 29 by said reduced bore 50 and said screws are removable through oil chamber 51. The upper end of section 29 is provided with a bore 55 which leads upwardly from chamber 51. Arranged in this bore is a cup member 56, the flanged upper end of which rests on the upper end of section 29. The bottom wall of this cup member is provided with a central aperture through which the shaft 17 extends upwardly from chamber 51. The lower end of this cup member receives a ring 57 and the upper end is provided with a ring 58 which is channel-shaped in cross section and is provided with a flange 59 which overlies the flange of cup member 56. These flanges are provided with apertures in which are received screws 60 which are screw-seated in the upper end of section 29 and serve to hold ring 58 and cup member 56 in position. Interposed between rings 57 and 58 is a packing 61 which surrounds shaft 17 and forms a seal therefor so that oil cannot escape upwardly along said shaft from chamber 51.

Section 29 is provided with a series of obliquely disposed bosses 62 (three in the instant case) space equidistant about the axis of rotation and extending downwardly from the cup-shaped member 56. Each of these bosses is provided with a threaded bore in which is received a screw 64. This screw extends through an aperture formed in cup member 56 and bears against the obliquely disposed wall 57a of the bottom ring 57. Thus by turning said screws said ring can be adjusted upwardly to compress the packing 61 when the latter is worn.

The upper or stationary casing member 12 is formed at its lower end with a skirt 12a which overhangs and encloses the upper end of section 29 and the flanged ends of ring 58 and cup member 56. This skirt is provided near its lower end with an annular shoulder 12b. The upper end of section 29 is provided adjacent to said shoulder with an upwardly presented annular shoulder 65 having a groove or annular seat 66 formed therein. Spaced below this shoulder and formed adjacent to the lower end of skirt 12a said section 29 is formed with another shoulder 67 having an igeeeneo annular'groove or seat-68 These grooves 66 =and 68 lare'filled with greaseandfbrm a seal between section 29 *andskirt 12a so that dust cannot enter;

The. space formedby the" channebshaped ring 5" 58*is alsofilled with" grease to provide lubrication" for "the upper portion" or shaft 17- and to provide additionalTdust seal: The-grease is forcediihto the chamber formed-byskirt 12a through aper 71' through. which grease is admittedf into said ring. An annularchamberGQa is'formediin the lower end of casing" 12 adjacent to" aperture or" bore 69 and'above'thering5'8. ThischamberSQa" 15 not only serves to distribute the"greasei.to aper= tures 71, but serves as a reservoir for thegrease';

The lower end of bore. extendsia'suitabledis= tancbelowthe lower endofshaftl'l and is'tap whichextends upwardly to a: point'abovetheupper end of bushing 52.

the upper end of" said groove isdi'sposed in oil chamber .51"; The arrangement of'the groove" with respectv to the direction of rotation of 'the supply of'lubricant;

inwardlyby the bottomwall of member 56 wherefrom oil'chamber 511into thelargebore 49 occupiedbythe collar. 17d and bearing rings 24 and26.

Thus the oilis conveyed'from the oil'chamber d1- .rcctly to .theseparts (see Figs. .5.'and6)'..

to reservoir 74' by means-ofaflpairof diametrically opposed. ducts .or passageways 'l'll'which are pref erably arranged. at right angles. to. ducts H76. (see Figs. 1 and.5 These. ducts'll extendftoithe with ducts'78 formedlinsection32. Ducts 'T8"op.en

ordischarge intoreservoin7411v The oil'is admitted into the. journal. throng-h. arfiller. opening 79" H formed -in-.thewall of! section 31. This opening fib leads into chamber 51 andis spaced" a suificient distance above the upper end of ducts '76 and '77. Preferably this opening is formed in a bushing 80 which is screw-seated in said wall. A plug 81 is screw-seated in said bushing and closes the filler opening '79.

In the modified form shown in Figures '7 and 8 the upper end 82 of shaft 84 is not screw-threaded in the upper end of casing 12 but extends there- .above and receives an adjusting nut 85. This nut rests on casing 12 and supports the shaft.

A look nut 86 is screw seated on the threaded end of shaft 84 and locks the nut 85. A pin 87 may be used to prevent rotation of said lock nut relatively to the shaft. A cap 88 is attached to the 75" upper end of casing 12 by bolts 89. This cap is ture16 9 whichiisnormally closed by a cap -70. The upper wallof ring 58. is" provided with aperturesered to form anoil reservoir '74fwhiclrccntains" a suitable quantityofioil; The 'peripheraltfaceof the. lower. portion ofshaftil? and of'collar 17a" is provided with afispiralgroove'. or screw-thread 75" Thus the lowerend: ofthe groove is disposed in the oiLreservoir 74..and"

.Jower casihgmember 28"is such thatoiriscaused' ""to how upwardly in the-groove from reservoir 741.. Thus bearingslor bushings 44 and52'ias well as bearing rings .24 and26 are provided at. alltimesdurihg'the operation offthe journal iwith an ample The rotation of the casing member 28causes theoil'in chamber 51"to move upwardly upon the peripherallwallof said casing and to be. deflected .by the shaft;apertures fbrmedLinsaidiwallandin' ducts orpassageways-76' which lead downwardly The surplus. oil is: returned. from chamber 51" lower end of memberfBl wherethey communicate.

prov-ided' with l a oliamber w to receive nut 88 and. witha smaller chamber 91 =toreceive nut 86. This-- chamber 91- i's 'of the same crosssectional contour as' nut 86-sothat the latterand'shaft' 84 are held against rotation when-said capis -in place. Cap 88 is provided" witha shoulder 88'awhich 8 bears against the nut i and takes up the' end thrust of shaft 84; Inthe preferred form this end thrust is taken care of by the interengagement of the'threadedshaft portion 16 with the threaded' portion 15 of "the casing member 12. 85

The lower section 30 of the revoluble casing member 28 is preferably provided with a plurality of annular grooves 30'awhich communicatewith'bores 78and surround the bushing 44; The" purpose'iof thesegroovesis to=increase the oil capacity of 'the casing.

In theoperationofthe journal, when the spider is rotated the journal swingsoutwardly outrunnion'shaft 10- sothat the roller 37 is moved by centrifhgalaction against the grinding ring or 95 bull ring, of the mill. Thus revoluble motion is imparteclto said roller and said casing member 2irwith the'shaft 17'asthe axis of rotation and as'arsupportfor= said rollercarryingmember- 28';

Thelatter'issupported on saidshaft by 'means ofcollar 17c and carrying rings Z i-and 26 while thelateral thrust is taken up by bushingsor bear-- ings44 and523 The" spiral groove 75 which" may be formed either on the peripheral face of the shaft or in 5 the" inner" faces of bushings- 44 and 52 supplies lubricantto said bushings and forces the oil up-- wardly past saidcarrying rings- 24and 26 into the oil'chamber' 51. From this ohamberthe oil isit deliveredby gravity-throughductsflfi to chamber 49and the carrying rings while'thesurplus oil is returned to reservoir '74by ducts-77 and 78'. Thus" a positive'circulation of oil isinsured and; the bearings are forcibly supplied with oil; 51* A sufficient amountof oil ismaintainedin the 11 journal so that the normal level of the oil is located' in chamber '51 above the upper end of bushing 52. In this manner allofthe bearings are submerged in oil and the various ductsas well 3:: as thegroove 75 and chamber49 are utilizedas auxiliary reservoirs. Theiorcible= circulation of" oil from the" reservoir to the oil chamber and thence downwardly'not onlyfurnishes the necessary amount of lubricant to the bearingsbut also assists incooling the oil.

The; packing 6]. excludes dust" from chamber 51' andthe'bearingslocated in revoliible casing 28" and: at'the sametime it serves as a seal topre ventescape of oil from said chamber 51 along the shaft. Thispacking isadjustable by means of screws 64- so that saidpacking can be pressed upwardly against the ring 58 -by the bottom: ring 57"andfornr efficient seal at all times;

The greasecontained in* thechamber: of ring 58 and in the annular chamber 69a forms additional dust seal for said shaft. Such grease as escapes from chamber 69a outwardly and downwardly between the upper end of revoluble casing 28 and the skirt 12a of the casing 12 is trapped in the upwardly presented annular grooves 68 formed in the stepped portions of member 28.

As the carrying rings 24 and 26 are subjected to wear and it is desired at all times to maintain the roller 37 in proper operative relation with respect tothe bull ring, the shaft 17 is formed 1 5 adjustable in member 12 whereby said shaft can be moved upwardly to compensate for the wear of said carrying rings. To adjust said shaft, cap 19 is detached from the upper end of member adjust the shaft longitudinally relatively to the axis of the trunnion shaft 10.

My improved roller mill journal has large oil capacity and the bearings are positively supplied with lubricant. There is a more even distribution of grease due to the annular chamber 69a and less grease leakage is encountered due to the cupped annular shoulders formed on the upper end of the revoluble casing member.

The axial adjustment of the shaft takes care of the wear of the carrying rings in a simple and efficient manner.

My improved joiunal is of sturdy construction without being excessively heavy and is constructed that it can be readily assembled and disassembled.

While I have shown the preferred form of my invention, it is to be understood that various changes in the construction and arrangement of parts of my improved journal can be made without departing from the spirit of my invention.

I claim:

1. A journal for roller mills comprising in combination a stationary casing, a solid shaft screwthreaded at its upper end in said casing and projecting downwardly therefrom, a collar formed integral with said shaft near the lower end thereof, a revoluble casing enclosing said collar and the projecting end of said shaft and having its upper end enclosed within the lower end of said stationary casing, bearings in said revoluble casing for engaging said collar and supporting said revoluble casing, the latter being provided with an oil reservoir, said shaft and said collar being provided with spiral grooves for conveying oil from said reservoir to said bearings, a packing arranged in the upper end of said revoluble casing and engaging said shaft to form a dust and oil seal therefor, and means in said revoluble casing for adjusting said packing, said means including a fixed collar carried by the upper end of said revoluble casing and engaging the upper end of said packing, a loose collar arranged in said revoluble casing and engaging the lower end of said packing, and a plurality of screws extending obliquely and radially into said revoluble casing and engaging said loose collar whereby by adjusting said screws said packing can be compressed.

2. A journal for roller mills comprising in combination a stationary casing having an axial bore, the upper end of which is provided with an internal screw-thread, a solid shaft having its upper end formed with an external screw-thread engaging the screw-threaded bore of said casing, said shaft extending downwardly from the latter, a collar formed integral with said shaft near the lower end thereof, a revoluble casing enclosing the projecting end of said shaft and said collar, bearings in said revoluble casing for engaging said collar and revolubly securing said revoluble casing on said shaft, a roller fixed on the lower end of said revoluble casing, the latter being provided in its lower end with an oil reservoir, said shaft and said collar being provided with peripheral grooves and said revoluble casing being provided with passageways whereby oil from said reservoir is conveyed under pressure to said bearings by said peripheral grooves and is returned by gravity to said reservoir through said passageways, a packing arranged in the upper end of said revoluble casing and engaging said shaft to form a dust and oil seal therefor, and a plurality of screws screwseated in said casing and extending radially thereinto for engaging said packing, said screws being adjustable for adjusting the compression of said packing.

3. In a journal for roller mills, the combination with a stationary solid shaft having an integral collar formed near its lower end, of a revoluble casing enclosing the lower end of said shaft including said collar, bearings engaging said collar 105 for supporting said casing on said shaft, a roller carried by the lower end of said casing, a packing arranged in the upper end of said casing and engaging said shaft, a ring fixed to the upper end of said casing and engaging the upper end of said 110 packing, a ring movably arranged in said casing adjacent to the lower end of said packing, and a plurality of adjusting screws screw-seated radially and obliquely in said casing and engaging said movable ring whereby the latter can be adjusted 115 by said screws to increase the compression of said packing.

4. In a journal for roller mills, the combination of a stationary shaft having an integral collar near its lower end, a revoluble casing enclosing the lower half of said shaft including said collar, a roller mounted on the lower end of said casing, a, fixed bearing member fixed to the upper face of said collar, a revoluble bearing member fixed to said casing and engaging said fixed bearing member whereby said casing is revolubly supported on said collar, a seal ring fixed to the upper end of said casing, another seal ring movably arranged in said casing below and in spaced-apart relationship with said fixed seal ring, a com- 1 0 pressible packing arranged between said seal rings and engaging said shaft, and means for adjusting said movable seal ring to increase the pressure contact between said packing and said shaft.

CHARLES EDWARD HERMANN. 

